Sry for being short at the time:

http://research.bmh.manchester.ac.uk/bryce/amber/

U can download Parameters there.

Thank you@Norman Geist . Sorry, i don't know how should i use it? It is't like amber ff atomtypes.atp file? Would you please help me?

You need to incorporate parameters from the frcmod file into the gromacs format. It might be easy to do at the example of an existing ion.

Yes, thank you so much @Norman Geist

I just have one more question, i functionalized Mn-contained nanotube by another O-contained moleculeA new bond formed between Zn and O. If i want to study the whole struture with MD. How should i define this bond in ffbonded.itp

I attach pictures( what quantity for epsilon,LJ parameters, ffbonded.itp?) Sigma would be binding distance?

Basically the LJ parameters are coordinates to the minimum of the potential. So epsilon is the well-depth and sigma the distance value. I guess you must convert the parameters based on what gromacs uses in its files (eV->kcal/mol and A->nm ?)